Global climate change warming footage: Chunk of glacier melting, calving off and falling down in Alaska on a dark gloomy overcast day with snow capped mountains in the background

glacier calving ice berg glacier melting glacier antarctic greenland alaska arctic ice falling ice ice wall polar climate global warming thawing climate change iceland snow capped frozen freeze melting landscape cold blue earth ocean mountains melt collapse frost nature overcast planet beautiful cool warming snow wide break destruction disaster crash long shot chunk gloomy hills dark